Abrasive wheel coolant spraying spindle



Jan- 27, 1953 E. w. SPEICHER ABRASIVE WHEEL COOLANT SPRAYING SPINDLE Filed Aug. 15, 1952 IN V EN TOR. 2 MEE 14% 8/ 51 CHER ATTORNEY Patented Jan. 27, 1953 ABRAS'IVE WHEEL COOLANT SPRAYING SPINDLE ElmerW. Speicher, Birmingham, Mich, assignor of. one-half to Alfred B. Conti, Walled Lake,

Mich.

Application August 13, 1952, Serial No. 304,186

6 Claims. 1

This invention relatesto. a novel and inventive grinding wheel spindle combination which includes a non-rotating coolant passing fixture and a novel and inventive means, for passing coolant to the face ofa grinding, wheelmounted: on said spindle.

Grinding wheel spindles have been. arranged both with rotating and non-rotating coolant passing tubes, and they have been arranged with a number of means for passing the coolantacross the face of the grinding wheel. However, none of these constructions utilizesthe rotatin wheel spindle itself and the mounted abrasive wheel thereon for containing and casting the coolant upon the workface oi the wheel when in operation.

It is therefore an objectof this invention to provide a non-rotating coolant passing fixture in a grinding wheel spindle combination.

Another object. is the provision of a mean on the front end of the abrasive wheel. spindle assembly for containing the coolant passed by the fixture, and for spraying it out upon the work face of the grinding wheel when the spindle is rotated.

A further object is the provision, of means on said spindle by which a range of abrasive wheel thicknesses may be accommodated by the invention hereindescribed, without modification of the device.

A further object is to provide a means of confining the spray of coolant to the work face of the abrasive wheel, or to the particul-ararea of the wheel being used.

Still another object is to. provide a. novel and inventive means for mounting the coolant passing fixture on the abrasive wheel spindle housing.

Other objects will become apparent from the following specification, the drawings related thereto, and from the claims hereinafter set forth.

The description together with the appended drawing is a disclosure of one formwhich the invention may take,- andis not in anywayintended to be a limitation of the formsor variations which persons skilled in the art? may make. The terms are used for purposes of description and not of limitation.

Referring now to the drawing annexed? hereto and forming an integral, part. of this specification,

Fig. l is a sectional viewor the. inventive construction taken on the line |j l. of' Fig. 2;

Fig, 2 is a rear end view of the, grinding wheel assembly of'Fig. 1.

Fig. 3- is a front end view ofthe grindin wheel assemblyof Fig. 1.

As shown in Fig.1, the-abrasive wheel spindle assembly I0 is mounted on a column support 12 through an opening 14 therein.

The assembly It) consists of a spindle 16 mounted in a bearing housing 18, which is held in place on the columnsupport l2 by a bracket 20.

Spindle I6 is arranged with a single. diameter main portionor barrel 22, a bore 23,.a rear end portion 24 of smaller diameter than barrel 22, ending in a threaded portion 26. At the front end of the spindle, the barrel 22 has a shoulder 28 which in turn blends into the mounting plate hub 38, and ends with a sleeve portion 3|, of lesser diameter than. hub 30. The bore 23 ends at the front ofv spindletlfi with a counterbore 32. Mounting plate 33 is pressed onto hub 30 and welded in place. After welding, the usual practice is to normalize byheattreatment and finish machine the piece to size and shape as: shown. The outer face 34 of mounting. plate 33 is provided with those means, such as mountingscrews, etc. which persons: skilled in the art would apply to hold an abrasive wheel or disc 36 in fixed mounted position on plate 33. The abrasive wheel 36 having 2;.W01k face 31;.is-provided'with a counterbore 38 and a. spindle bores39 which fits over spindle sleeve 31,. and is positioned against the outer. face 34' of mounting'plate33.

The spindle housing. [8 has a: single diameter cylindrical opening 40 bored therein, and aninturned flange 42' presenting ashouldertfl, at the front end of the housing- An external flange 46 at the front end. of housing I8. is arranged with a shoulder 48 abutting the column support I2. Inside housing bore 4t! is abronze sleeve bearing BE), in which spindle'barrel 22rotates. Ball bearings or roller bearings may be-substituted and are commonly used in placeof the sleeve bearing 50 shown. The bearing arrangement is a matter of choice and is only indirectly related to the inventive construction hereindescribed and claimed.

The spindle lii is sealed into the housing I8 at the front end by dirt labyrinthseal flange 52 pressed on the mounting-plate shoulder 54-, which is arranged to provide a smallclearance between the flange 52' and housingfl'ange' lt.

The spindle [6 at; itsrearward'portion, projecting outwardly beyond bearingifl, hashub portion 2 3 of smaller diameter than barrel 22, to receive a drive pulley 56"01 other suitable drive means. Pulley 56 ismountedon' spindl'e'portion 24 by screws or'keys (not shown) or'in any other suitable manner wellknown in the art. To hold:

3 pulley 56 on the spindle portion 24, a lock nut 58 is threadedly mounted on spindle threads 25.

The bracket 20, having a split sleeve 60 held together by screws 62, a web 64 integrally formed and projecting perpendicularly from a portion of sleeve 60, and an upright support 66 integrally formed with web 64 and arranged parallel to sleeve 60, is mounted on spindle housing l8 about its rearward end and against column support l2.

Bracket upright support 66 has an opening 68 bored therethrough concentric with the spindle axis. Into this opening 68 is pressed a coolant passing tube 10 having a hub portion 12, a tube portion 14 and a forward flared end 16. Hub portion 12 is internally threaded to receive and hold a coolant passing conduit fitting 18. Coolant conduit 80 is connected to a coolant pump and well (not shown) which serves as a source of supply. Such equipment is highly variable in character and form and is well known in the art. The coolant tube 10 is fixedly and nonrotatably mounted in bracket support 66 so that tube portion '14 is substantially concentric with the spindle axis.

At the mounting plate end of spindle l6, counterbore 32 within sleeve portion 3| contains a number of spaced radial openings 82 passed through the wall of sleeve portion 3|. The radial openings 82 may lie in a single plane, as shown, or may be otherwise arranged. The length of sleeve portion 3| must be such that the abrasive wheel thickness will not extend beyond its length, and the position of the radial openings 82 must be such that the abrasive wheel will not cover them and close them off. It is preferred that all of the radial openings 82 lie outside of the counterbored wall 84 of'abrasive wheel 36. In the case of a straight wheel 36, in place of the cup wheel shown, the radial openings 82 should also lie beyond the exterior face of such Wheel 35.

At the outer end 86 of spindle sleeve 3|, threads are arranged around it periphery to receive a blind spanner nut 88 having an internally threaded portion 90, a counterbore 92 and radial slots 94 issuing from said counterbore 92 across the inner annular face 95. The counterbore 92 provides a passageway from the radial openings 82 through spindle sleeve 3| to the radial issuing slots 94 of nut 88. This counterbore 92 may be deeper and/or wider than shown to accommodate thicker or thinner abrasive wheel sections, as required; and also to handle more or less coolant per revolution of the spindle, which plays it out in accordance with its centrifugal force.

Some of the assembly data has been given above, but it may be well to go through the entire procedure of assembling this inventive structure in order to more clearly indicate the relation and significance of its parts. Front end dirt flange 52 is pressed onto mounting plate shoulder 54, and spindle I6 is placed within the sleeve bearing 50. Pulley B is mounted on spindle portion 24 and pulley lock nut 58 is threaded onto spindle threads 26. Into opening M of column support |2 i placed the spindle housing |8 until its external flange shoulder 43 abuts the support |2. Bracket 20 is placed over the rear end of housing l8 and split sleeve 60 is brought up tight against column support |2 before sleeve locking screws 62 are tightened. The coolant passing tube T9 is pressed into bracket support opening 68, with tube portion 14 arranged substantially concentric about the spindle axis within spindle bore 23. The coolant tube flared end 16 projects, after assembly, into the counterbore area 4 32 of spindle l6. By threading the blind spanner nut 88 over the outer end 86 of spindle sleeve 3|, the coolant is first sprayed directly onto the counterbore wall 84 of abrasive cup wheel 36.

The coolant, by centrifugal force, when cast from spindle counterbore 32 through radial openings 82, through blind nut counterbore 92, through radial slots 94 in the blind nut inner annular face 96, out upon the abrasive wheel counterbore wall 84, will flow along the wall and up onto and across the work face 31. If the work face 3! is reasonably porous, and in most cases it is, a certain amount of coolant absorption will occur that indicates a passageway through the work surface of the wheel as well as across its face. Further, the blind spanner nut counterbore 92 allows for coolant spraying over abrasive wheels which are heavier or thinner in section than those which, as in Fig. 1, come up to the plane of the radial openings 82 in spindle counterbore 32.

It will, of course, be recognized that the press fit of coolant tube hub 72 in bracket support opening 68 makes it possible to remove the coolant tube 10 without disrupting the grinding setup of housing l8 in column support I2, or altering the front end structure in any way. Reinsertion of coolant tube 10 likewise does not disturb the working mechanism.

It is to be understood that instead of threading blind spanner nut 88 onto the spindle sleeve threads 86. it may be adjustably mounted on spindle sleeve portion 3| by other means, such as by placing the nut minus its internal threads over the outer end of spindle sleeve portion 3| and holding it against the counterbore wall 84 of abrasive cup wheel 36 by the use of screws which hold the nut to the wheel or to the spindle sleeve portion 3|. The wide variety of ways in which this can be accomplished is well known in the art. The manner described herein is a preferred way of simply and easily conjoining the nut 38 and spindle sleeve portion 3|.

Having described my invention in its simplest terms, it is to be understood that the details of the foregoing specification may be changed and varied in greater or lesser degree Without departing from the essence of my invention.

I claim:

1. A device of the class described comprising an abrasive cup wheel having a central bore and counterbore, a wheel mounting spindle rotatable in a coliunn supported housing, drive means for rotating said spindle, said spindle having a bore therethrough, a counterbore at the wheel mounting end thereof, and a sleeve portion encompassing said spindle counterbore, a bracket mounted on one end of said housing having an integrally formed split sleeve, web and an upright support parallel to the plane of said split sleeve, a coolant passing tube arranged through said spindle substantially concentric with the spindle axis and supported by said bracket upright support and having a front end projecting into the area of said spindle counterbore, coolant passing radial openings from said spindle counterbore in said spindle sleeve portion, and a blind nut threadedly mounted on said spindle sleeve portion enclosing the same and having a counterbore therein encompassing the said radial openings of said spindle sleeve portion, and coolant passing radial slots in said blind nut issuing from said nut counterbore.

2. A device of the class described comprising an abrasive cup wheel, a wheel mounting rotatable spindle, drive means for rotating said spindle, said spindle having a bore therethrough, a counterbore in said spindle at its wheel mounting end and a sleeve portion encompassing said spindle counterbore, a non-rotating coolant passing tube arranged substantially concentric in said spindle bore, said spindle sleeve portion having radial coplanar coolant passing openings therein, and a blind nut mounted on said spindle sleeve portion having a counterbore therein encompassing said radial coplanar coolant passing openings and having an inner annular face, said inner annular face having coolant passing radial slots issuing from said blind nut counterbore, said blind nut being held firmly on said spindle sleeve portion in close touching contact with and overlying a portion of said abrasive cup wheel.

3. The combination consisting of the device of claim 2 and including a column supported spindle housing and a bracket on said housing adjacent its column support consisting of a screw tightened split sleeve arranged about said spindle housing, a web at right angles to the plane of said split sleeve, and an upright support parallel to and spaced apart from said split sleeve by said web, said split sleeve, web and upright support being integrally formed together, said upright support having an opening therein concentrically containing the spindle axis, said nonrotating coolant passing tube being seated in said upright support opening substantially concentric with said spindle axis and passing through said spindle bore into the area of said spindle counterbore, said bracket upright support being positioned beyond the end of said spindle drive means.

4. A device of the class described consisting of an abrasive cup shaped ring, a ring mounting rotatable bearing supported spindle having a bore and a counterbore therethrough and a sleeve portion encompassing said counterbore, drive means for rotating said spindle, a coolant passing tube non-rotatably supported and concentrically arranged in said spindle bore and projecting into the area of said spindle counterbore, said spindle sleeve portion having radial coolant passing openings therethrough, and a blind nut adjustably mounted on said spindle sleeve portion enclosing the end thereof, said blind nut having a counter- Number Name Date 546,025 McKirn et a1 Sept. 10, 1895 1,396,123 Joseph Nov. 8, 1921 1,698,970 Shafi Jan. 10, 1929 1,971,790 Mall Aug. 28, 1934 bore therein encompassing said spindle sleeve portion radial openings and having coolant passing radial slots in its inner annular face issuing from said blind nut counterbore, said inner annular face of said blind nut being arranged in close touching contact with and overlying a portion of said abrasive ring.

5. In a device of the class described, the combination consisting of a coolant passing tube supporting fixture consisting of a screw tightened split sleeve, a web at right angles to the plane of said split sleeve, and an upright support parallel to and spaced apart from said split sleeve by said web, said split sleeve, web and upright support being integrally formed together, said upright support having an opening therein concentric with the axis of said split sleeve, which axis passes through said upright support, and a coolant passing tube having a hub on one end thereof adapted to fit and seat in said upright support opening, said coolant passing tube being arranged substantially concentric with the axis of said split sleeve.

6. In a device of the class described, the combination consisting of a. screw tightened split sleeve, a web at right angles to the plane of said split sleeve and formed integrally from said split sleeve, and an upright support parallel to and spaced apart from said split sleeve by said web and formed integrally with said web, said upright support having an opening therein concentrlcally containing the axis of said split sleeve, and a coolant passing tube seated in said upright support opening substantially concentric with said split sleeve axis and passing through said split sleeve.

ELMER W. SPEICHER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

